The number of possible constitutional isomers of an alkane with the formula $C_6H_{14}$ is:

The alkane formed on heating sodium butanoate with sodalime is

What is $Z$ in the following sequence of reaction? $2-$methyl$-2-$bromopropane $\underset{\text{Dry ether}}{}$ ${\xrightarrow{Mg}} X$ $\xrightarrow{H_2O} Z$

$2-$methylpropane on monochlorination under photochemical conditions gives:

The angle strain in cyclopropane is:

Propane molecule on chlorination under photochemical conditions gives two dichloro products,$x$ and $y$. Amongst $x$ and $y$,$x$ is an optically active molecule. How many trichloro products (consider only structural isomers) will be obtained from $x$ when it is further treated with chlorine under photochemical conditions?